1. Colombo, O. and Kleusberg, A.: 1983, ‘Applications of an Orbiting Gravity Gradiometer’, Bull. Géod.
57, pp. 83–101.
2. Drozyner, A.: 1995, ‘Determination of Orbits with Toru/n Orbit processor’, Adv. Space Res.
16, No. 2.
3. Lemoine, F., Kenyon, S., Factor, J., Trimmer, R., Pavlis, N., Chinn, D., Cox, C., Klosko, S., Luthcke, S., Torrence, M., Wang, Y., Williamson, R., Pavlis, E. and Rapp, R.: 1998, R.: 1998, ‘The Development of the Joint NASA GSFC and the National Imagery and Mapping Agency (NIMA) Geopotential Model EGM96’, Report No.206861, July 1998.
4. Metris, G., J. Xu, and Wytrzyszczak, I.: 1999, ‘Derivatives of the Gravity Potential With Respect to Rectangular Coordinates’, Celest. Mech. and Dyn. Astron.
71, pp. 137–151.
5. Rummel, R., and Colombo, 0.: 1985, ‘Gravity Field Determination From Satellite gradiometry’, Bull. Géod.
59, pp. 233–246.